In April, Google brought a new confidential mode to Gmail’s desktop version, allowing you to send emails that automatically expire. The idea being that if you use Gmail to send confidential information (which let’s face it, isn’t the safest idea), then using the confidential mode will make that decision a little bit safer.

Messages can be set to expire after a specific period of time like a week or a month, and the sender can decide to revoke access to them whenever they want. You can also password-protect an email so that the recipient will need a code sent to them via SMS in order for them to open the email in the first place.

Want to give it a try? Here’s how to make it happen on mobile. The same instructions work for both the Android and iOS version of the app:

Open the Gmail app and then compose your message. Within the message, tap on the hamburger menu from top right (the three dots stacked on top of each other) and select “More” followed by “Confidential Mode.”

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Image: E.Price / Gmail

When you select Confidential Mode the app will launch a menu page where you can select the expiration date for your message or create a passcode (which can be SMS or not) for it. If you’ve changed your mind about sending a message confidentially, you can also toggle the feature off on this page.

That’s it!

If you decide later on that you want to revoke access to the email, you can do that by launching Gmail, tapping the hamburger menu in the top left side of the page, and selecting ‘Sent.’ From there, find the email you want to revoke access to, and then select ‘Remove Access’ from the bottom of the page.